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I would have someone check under the front of car while engine was running. Maybe then a gas leak could be spotted. Did he check the charcoal canister-it's a gas vapor collector from the gas tank, and maybe located at front of car. If the canister is full and not working to purge the canister and send the collected fuel and vapors into the engine, it might be what you are smelling.
You should never drive a car with a red hot catalytic converter. If the catalytic converter is heater up to the point where it is that hot, it could be a serious fire hazard. Cars which might have a leak in a fuel line could be at a major risk for a fire or explosion if gas fumes come into contact with a catalytic converter in that condition. ----------------------------------------------------------------- Lexia-3 pp2000
tu bomba no esta con la presion correcta cambiala y el sedaso y filtro de gasolina por eso se apaga y falla comprale una bomba bosh de gasoline no aditive to tank las inpuresas te danan los inyectores la bomba le queda la de astro yukon s10 truck
this sounds like a saturated gas vapor recovery cannister, (part of the evaporative emission control system) have the paper filter on the bottom of the cannister checked blockage, otherwise the fumes can't be sucked out by the emission system on start up purge cycle and u get this gas smell.
The issue is not the purge valve. If you have a strong odor of gas, and no fuel leaking under the car, you have one of the evaporative emission hoses compromised. Can you get the car raised on a vehicle hoist? If so, check the lines that run along the side of the car, I will bet that you will find pin-holes in one of the evap lines. Get back to me if you need more info.